I have a strange issue. I have downloaded some WMV files on my Android to watch them while offline. I watched some of them and now all of a sudden I see "sorry, video cannot be played". None of the videos work any more, not even the ones I watched.

How can I fix this? Please don't suggest WMV players. It worked, now it no longer works and I want to fix it. Reboot didn't help either.

Though you say "nothing changed", maybe your video player app got a "silent update" (can happen if you have your playstore app configured to allow auto-updates, so you might not have noticed). So it might be worth checking with a different app which explicitly states WMV support -- at least you then can tell whether its the app's fault, or your files "got broken".
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IzzyAug 4 '12 at 18:27

You could try to clear the app data of the videoplayer app and see if this works. Although you don't want suggestions for other players: Is this problem tied only to the default player or do other apps also have problems with those wmv files?
–
ce4Aug 5 '12 at 0:44

This happened to me a month or so ago. I gave up and used a 3rd party player instead but it would be a real treat if there's actually a fix for this.
–
PropellerOct 17 '12 at 16:31